Device for rolling threads



Sept. 22 1942. K. Mu-rzE 2,296,565

DEVICE FOR ROLLING THREADS Filed May 51; 1940 2 Sheets-Sheet l .[flrem/or KUET MUTZE ,4 Trek/Mk5.

K. MUTZE DEVICE FOR ROLLING THREADS Sept. 22, 1942.

2 Sheets-Sheet 2 Filed May 31, 1940 1% ml 2 VP v r E v mentioned disadvantage.

Patented Sept. 22, 1942 s PATENT OFFICE DEVICE FOR ROLLING THREADS Kurt Miitze, Neuss-on-the-Rhine, Germany;

vested in the Alien Property Custodian Application May 31, 1940, Serial No. 337,989

Germany June 3, 1939 3 Claims. (Cl. 80-6) The present invention relates to a device for rolling threads particularly circumferentially uniform threads.

In devices of this kind known hitherto the workpieces to be provided with rolled on threads were placed upon bearings which, in a manner known per se, were either wedge-shaped, or of oval or round cross section. These known devices, however, have the disadvantage that it is impossible to obtain a thread which is exactly 'round and circumferentially uniform.

The object of the invention is to avoid the above According to the invention the workpieces are centrically arranged between centres which for the purpose of adjustment with regard to the thread rollers may effect pendulum movements. In a device for carrying out this method a pendulum body is for instance provided the ends of which are suspended in such a manner that said body may perform pendulum movements about a line extending in parallel to the longitudinal axis of the workpiece. The ends of the pendulum body are provided with adjustable centres between which the workpiece is arranged. To allow a pendulum movement, the ends of the pendulum body are journalled on two pins. However, any desired other bearing arrangement may be used. The pins round which the pendulum body swings are in turn arranged in a stationary base member.

For highest demands on exactness the present invention provides a possibility that the workpieces placed between centres also are capable of performing a movement in the direction of their axis, in order to avoid additional stresses. According to the invention this is obtained by the fact that the workpieces which are to provide with rolled on threads are placed between centres or the like which, besides a common pendulum movement, also are adapted to perform a longitudinal movement in the direction of the connecting line between the two centres. The support of the workpieces preferably is effected upon a pendulum body which in the direction of the connecting line of the two centres may perform a longitusmooth sliding faces or by means of rollers or balls.

The possibility of performing a longitudinal movement besides the pendulum movement is absolutely necessary for a particular exact rolling of .ties in the pitch of the thread of the rollers or slight differences in the diameter of the rollers, eilecting a leading or lagging of the roller respectively, may cause stresses in the workpieces which tend to cause a longitudinal movement of the workpiece. In case the support of the pendulum body prevents longitudinal movements of this body these pressures and stresses respectively are, by the intermediary of workpiece and the fixing or setting device of the latter, absorbed by the body of the machine, whereby damages and inexact production of the rolled thread respectively are caused. All these disadvantages are removed by the described support of the workpieces, so that during rolling, besides the forces effecting pressing of the thread, no additional forces may occur. The thread, therefore, may practically be rolled free of stresses.

In the accompanying drawings some constructions according to the invention are shown by way of example.

dinal movement also. To this end the pendulum body may be slideably mounted upon acontinuous shaft. Instead of the shaft, a sectional bar having a uniform cross section may, of course, also be used. In this case, however, the ends of the sectional bar must be pivoted. It is also possible to arrange the pendulum body upon the slide adapted to be moved in the longitudinal direction.

The movement of the slide may be effected over In these drawings:

Fig. 1 shows a section through a pendulum body for fixing the workpiece, the thread rollers being omitted to better show pendulum body,

Fig. 2 is a section on line IIII of Fig. 1, showing diagrammatically the thread rollers,

Fig. 3 is aside elevation of a pendulum body pivotally and longitudinally upon a shaft,

Fig. 4 shows a side elevation of a modification according to which the pendulum body is mounted upon a longitudinally displaceable slide,

Fig. 5 is a front elevation of the construction shown in Fig. 4,

Fig. 6 shows a side view of a pendulum body mounted upon a slide arranged upon rollers and Fig. '7 is a side view of Fig; 6 showing at the left hand side a still other modification according to which the slide is mounted on rollers.

The individual elements shown in the various figures and corresponding to each other in construction and operation are designated with the 7 same reference characters.

The workpiece l which is to be provided with rolled on thread and which as shown in Figs. 1 and 2 is a screw bolt is journalled in centres 2, 3 the latter of which is adjustably arranged. The

the thread. So for instanceslight irregularithe arrangement of the shiftablymounted tudinal notch or piece I.

.rollers are diagrammatically shown in elevation.

, may for instance also adjustment of the centre 3 is eflected in a well known manner by means of a rotatable handwheel 7. During adjustment the shaft of the centre 3 is guided by a pin 86 sliding in a longigroove 57 of the shaft of the centre 3. The centres 2 and 3 are arranged in projections or brackets 5 and 6 of a pendulum body 4. The latter is suspended by pins 8 and 9 the common longitudinal axis of which is in the example shown in Figs. 1 and 2 arranged in parallel to and vertically below the axis of the work- In Fig. 2 of the drawings the thread Of these-thread rollers for instance the roller I I shown at the left hand side may be stationary, whereas the roller l2 shown at the right hand side may be movably arranged. The direction of rotation of the roller and the direction of the pendulum movement of the body 44 are indicated by the arrows'shown in Fig. 2. v

Without departing from the spirit of the present invention, the axis of the pendulum body 6 be arranged above the axis It is of importance only that mayrotate about an axis parallel to the axis of the workpiece and of the rollers, the rotation of the pendulum'body must, of course, also correspond to the movability of the roller I2.

In the constructions shown in Figs. 3 to 7 also the pendulum body is designated d and the corresponding centres 2 and 3. The hand-wheel 7 serves to adjust the centre 3. The pendulum body 6 is longitudinally and rotatably mounted upon a shaft la the ends is of which are carried by two bearings provided on a bearing block 21!. For the operationof the device it is of no importance, whether the pendulum body 4 is longhtudinally movably. arranged upon the shaft 88, or whether the latter is longitudinally displaceably arranged in the bearing block 20.

In Figures 4 and 5 the pendulum body t is pivotally mounted upon two pins 8 and 9 carried by a longitudinally displaceable slide 20. The latter is guided in a bed l3. The thread rollers of the workpiece l. the pendulum body which is arranged in accuses the sense of rotation of which is indicated by arrows are designated with H and I2.

The construction shown in Figures 6 and 7 diflers from that shown in Figures 4 and 5 by the fact only that the longitudinally movable slide 2| is arranged upon rollers 22 or balls 23 respectively.

What I claim is:

1. A machine for rolling threads comprising a holder carrying centers to engage and support the opposite ends of a work piece, thread rollers arranged to engage opposite sides of a work piece supported by said centers, means slidably and pivotally connecting said holder to theframe of the machine for pivotal movement about an axis parallel with and spaced from the axis of the work piece in a direction substantially normal to the line of pressure of said thread rollers against said work piece and for longitudinal movement in a direction parallel to the axis of said work piece.

2. A machine for holder having aligned centers to engage and support the opposite ends of a work piece, thread rollers arranged to engage opposite sides of a work piece supported by said centers, said holder being pivotally and shaft arranged parallel with the axis defined by said centers and spaced therefrom in a direction substantially normal to the line of pressure of said thread rollers against .said work piece.

3. A machine for rolling threads comprising a pair of spaced thread rollers, a holder having aligned centers to engage and supportthe opposite ends of a work piece between saidthread rollers, said holder being pivoted to a carriage about an axis parallel to the axis defined by said centers and spaced therefrom in a direction substantially normal to the line of pressure of said thread rollers against said work piece, said carriage being slidably mounted upon the frame of the machine for slidable movement in a direction parallel to the axis of the work piece.

KURT MtiTzE.

rolling threads comprisinga slidably mounted upon a- 

